In the following video interview, Ann Mack, director of trendspotting at JWT, sits down with Brendan Byrnes to discuss the science and skill behind identifying big trends in their early stages. This sort of vision is absolutely vital for long-term investors and is a cornerstone of our own resident superinvestor David Gardner's system for crushing markets. He seeks out game-changing companies before Wall Street is keen to their potential and helps investors profit as the companies soarLearn more about how David discovers his winners today with a personal tour of his flagship serviceSupernova. Just click here now for instant access.

Brendan Byrnes: We were talking about retailers earlier. They're one of the things that's getting increasingly disrupted by e-commerce. All you have to do is look at what Amazon stock has been doing in the past year, versus your Best Buys, RadioShacks, hhgreggs. What are some ways that retailers can fight back? You say retail is everywhere. Are there some good examples of that?

Ann Mack: Yeah, there is a great example. Everything is becoming retail. It could be a flat surface, it could be a bus shelter, it could be a magazine ad; everything is becoming a retail channel.

An example of this is the shoppable wall. Earlier this year, for Fashion Week, Glamour had a shoppable wall, featuring many of its advertisers such as Johnson & Johnson, Unilever, John Frieda, and so on. It featured 2D barcodes that you could scan with your phone to buy those products. You don't need a physical location, necessarily, thanks to mobile technologies.